// MIT License

// Copyright (c) 2019 Erin Catto

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

#include "test.h"
#include "imgui/imgui.h"

class CompoundShapes : public Test
{
public:
  CompoundShapes()
  {
    {
      b2BodyDef bd;
      bd.position.Set(0.0f, 0.0f);
      b2Body* body = m_world->CreateBody(&bd);

      b2EdgeShape shape;
      shape.SetTwoSided(b2Vec2(50.0f, 0.0f), b2Vec2(-50.0f, 0.0f));

      body->CreateFixture(&shape, 0.0f);
    }

    // Table 1
    {
      b2BodyDef bd;
      bd.type = b2_dynamicBody;
      bd.position.Set(-15.0f, 1.0f);
      m_table1 = m_world->CreateBody(&bd);

      b2PolygonShape top;
      top.SetAsBox(3.0f, 0.5f, b2Vec2(0.0f, 3.5f), 0.0f);

      b2PolygonShape leftLeg;
      leftLeg.SetAsBox(0.5f, 1.5f, b2Vec2(-2.5f, 1.5f), 0.0f);

      b2PolygonShape rightLeg;
      rightLeg.SetAsBox(0.5f, 1.5f, b2Vec2(2.5f, 1.5f), 0.0f);

      m_table1->CreateFixture(&top, 2.0f);
      m_table1->CreateFixture(&leftLeg, 2.0f);
      m_table1->CreateFixture(&rightLeg, 2.0f);
    }

    // Table 2
    {
      b2BodyDef bd;
      bd.type = b2_dynamicBody;
      bd.position.Set(-5.0f, 1.0f);
      m_table2 = m_world->CreateBody(&bd);

      b2PolygonShape top;
      top.SetAsBox(3.0f, 0.5f, b2Vec2(0.0f, 3.5f), 0.0f);

      b2PolygonShape leftLeg;
      leftLeg.SetAsBox(0.5f, 2.0f, b2Vec2(-2.5f, 2.0f), 0.0f);

      b2PolygonShape rightLeg;
      rightLeg.SetAsBox(0.5f, 2.0f, b2Vec2(2.5f, 2.0f), 0.0f);

      m_table2->CreateFixture(&top, 2.0f);
      m_table2->CreateFixture(&leftLeg, 2.0f);
      m_table2->CreateFixture(&rightLeg, 2.0f);
    }

    // Spaceship 1
    {
      b2BodyDef bd;
      bd.type = b2_dynamicBody;
      bd.position.Set(5.0f, 1.0f);
      m_ship1 = m_world->CreateBody(&bd);

      b2Vec2 vertices[3];

      b2PolygonShape left;
      vertices[0].Set(-2.0f, 0.0f);
      vertices[1].Set(0.0f, 4.0f / 3.0f);
      vertices[2].Set(0.0f, 4.0f);
      left.Set(vertices, 3);

      b2PolygonShape right;
      vertices[0].Set(2.0f, 0.0f);
      vertices[1].Set(0.0f, 4.0f / 3.0f);
      vertices[2].Set(0.0f, 4.0f);
      right.Set(vertices, 3);

      m_ship1->CreateFixture(&left, 2.0f);
      m_ship1->CreateFixture(&right, 2.0f);
    }

    // Spaceship 2
    {
      b2BodyDef bd;
      bd.type = b2_dynamicBody;
      bd.position.Set(15.0f, 1.0f);
      m_ship2 = m_world->CreateBody(&bd);

      b2Vec2 vertices[3];

      b2PolygonShape left;
      vertices[0].Set(-2.0f, 0.0f);
      vertices[1].Set(1.0f, 2.0f);
      vertices[2].Set(0.0f, 4.0f);
      left.Set(vertices, 3);

      b2PolygonShape right;
      vertices[0].Set(2.0f, 0.0f);
      vertices[1].Set(-1.0f, 2.0f);
      vertices[2].Set(0.0f, 4.0f);
      right.Set(vertices, 3);

      m_ship2->CreateFixture(&left, 2.0f);
      m_ship2->CreateFixture(&right, 2.0f);
    }
  }

  void Spawn()
  {
    // Table 1 obstruction
    {
      b2BodyDef bd;
      bd.type = b2_dynamicBody;
      bd.position = m_table1->GetPosition();
      bd.angle = m_table1->GetAngle();

      b2Body* body = m_world->CreateBody(&bd);

      b2PolygonShape box;
      box.SetAsBox(4.0f, 0.1f, b2Vec2(0.0f, 3.0f), 0.0f);
      
      body->CreateFixture(&box, 2.0f);
    }

    // Table 2 obstruction
    {
      b2BodyDef bd;
      bd.type = b2_dynamicBody;
      bd.position = m_table2->GetPosition();
      bd.angle = m_table2->GetAngle();

      b2Body* body = m_world->CreateBody(&bd);

      b2PolygonShape box;
      box.SetAsBox(4.0f, 0.1f, b2Vec2(0.0f, 3.0f), 0.0f);
      
      body->CreateFixture(&box, 2.0f);
    }

    // Ship 1 obstruction
    {
      b2BodyDef bd;
      bd.type = b2_dynamicBody;
      bd.position = m_ship1->GetPosition();
      bd.angle = m_ship1->GetAngle();
      bd.gravityScale = 0.0f;

      b2Body* body = m_world->CreateBody(&bd);

      b2CircleShape circle;
      circle.m_radius = 0.5f;
      circle.m_p.Set(0.0f, 2.0f);

      body->CreateFixture(&circle, 2.0f);
    }

    // Ship 2 obstruction
    {
      b2BodyDef bd;
      bd.type = b2_dynamicBody;
      bd.position = m_ship2->GetPosition();
      bd.angle = m_ship2->GetAngle();
      bd.gravityScale = 0.0f;

      b2Body* body = m_world->CreateBody(&bd);

      b2CircleShape circle;
      circle.m_radius = 0.5f;
      circle.m_p.Set(0.0f, 2.0f);

      body->CreateFixture(&circle, 2.0f);
    }
  }

  void UpdateUI() override
  {
    ImGui::SetNextWindowPos(ImVec2(10.0f, 100.0f));
    ImGui::SetNextWindowSize(ImVec2(200.0f, 100.0f));
    ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize);

    if (ImGui::Button("Spawn"))
    {
      Spawn();
    }

    ImGui::End();
  }

  static Test* Create()
  {
    return new CompoundShapes;
  }

  b2Body* m_table1;
  b2Body* m_table2;
  b2Body* m_ship1;
  b2Body* m_ship2;
};

static int testIndex = RegisterTest("Examples", "Compound Shapes", CompoundShapes::Create);
